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-rw-r--r--include/openvic-dataloader/detail/utility/PointerHash.hpp23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/openvic-dataloader/detail/utility/PointerHash.hpp b/include/openvic-dataloader/detail/utility/PointerHash.hpp
new file mode 100644
index 0000000..c0d28bc
--- /dev/null
+++ b/include/openvic-dataloader/detail/utility/PointerHash.hpp
@@ -0,0 +1,23 @@
+#pragma once
+
+#include <cstdint>
+
+namespace ovdl::detail {
+ /* hash any pointer */
+ template<typename T>
+ struct PointerHash {
+ using type = T;
+ using ptr_type = T*;
+ using const_type = const T;
+ using const_ptr_type = const T*;
+ using const_ptr_const_type = const const_ptr_type;
+ constexpr std::size_t operator()(const_ptr_const_type pointer) const {
+ auto addr = reinterpret_cast<uintptr_t>(pointer);
+#if SIZE_MAX < UINTPTR_MAX
+ /* size_t is not large enough to hold the pointer’s memory address */
+ addr %= SIZE_MAX; /* truncate the address so it is small enough to fit in a size_t */
+#endif
+ return addr;
+ }
+ };
+} \ No newline at end of file